![[texts]](/images/mediatype_texts.gif) | Technology Complexity and Mass Minimization Approaches - Schuchman, Leonard
In this chapter an approach is presented that for a given G/T at the Earth terminal, provides the satellite EIRP required for a given data rate in terms of minimum technology risk design, as defined in section 7.1.1. The approach starts from an initial design made according to the criterion of minimum total mass of the antenna and RF power subsystems. Using definitions of technology risk, or complexity, for both subsystems, the design is refined such that the minimum technology complexity is pro...
Keywords: GAS MIXTURES; HYDROGEN FUELS; WEIGHTLESSNESS; PATENTS
Downloads: 73 |  |
| Evaluation of hydrogen fuel in a full-scale afterburner - Ciepluch, C. C.
Combustion efficiency of hydrogen fuel for varying afterburner configurations
Keywords: AFTERBURNING; COMBUSTION EFFICIENCY; HYDROGEN FUELS; AFTERBURNER; COMBUSTION EFFICIENCY; HYDROGEN FUEL
Downloads: 50 |  |
| The vestibular system and human dynamic space orientation - Meiry, J. L
No Abstract Available
Keywords: FUEL SYSTEMS; RAMJET ENGINES; TURBOJET ENGINES; COMBUSTION EFFICIENCY; HYDROGEN FUELS
Downloads: 84 |  |
| Distribution and abundance of organic thiols - Fahey, R
The role of glutathione (GSH) in protecting against the toxicity of oxygen and oxygen by products is well established for all eukaryotes studied except Entamoeba histolytica which lacks mitochrondria, chloroplasts, and microtubules. The GSH is not universal among prokaryotes. Entamoeba histolytica does not produce GSH or key enzymes of GSH metabolism. A general method of thiol analysis based upon fluorescent labeling with monobromobimane and HPLC separation of the resulting thiol derivatives was...
Keywords: CHEMICAL EQUILIBRIUM; COMBUSTION; COMPUTER PROGRAMS; GAS COMPOSITION; GAS MIXTURES; HYDROGEN FUELS; FUEL-AIR RATIO; THERMODYNAMIC PROPERTIES
Downloads: 14 |  |
| Map the distribution of glaciofluvial deposits and associated glacial landforms - Stoeckeler, E. G
There are no author-identified significant results in this report.
Keywords: ENERGY POLICY; HYDROGEN-BASED ENERGY; ABSTRACTS; ENERGY SOURCES; ENERGY TECHNOLOGY; HYDROGEN FUELS
Downloads: 48 |  |
| A characterization of the real zeros of a particular transcendental function - Hedgley, D. R
The real zeros of the transcendental function y = ax becx are characterized, and the results should alleviate the difficulty of determining their existence, location, and number.
Keywords: FLAMMABLE GASES; HYDROGEN; RESEARCH; CHEMICAL ANALYSIS; CHEMICAL PROPERTIES; HISTORIES; HYDROGEN FUELS; SCIENTISTS
Downloads: 54 |  |
| Low-pressure performance of a tubular combustor with gaseous hydrogen - Hlavin, V. F.
Combustion performance characteristics of gaseous hydrogen fuel in single tubular turbojet combustor
Keywords: COMBUSTION; COMBUSTION CHAMBERS; FUEL COMBUSTION; HYDROGEN; HYDROGEN FUELS; LOW PRESSURE; TURBOJET ENGINES; FUEL COMBUSTION; HYDROGEN FUEL
Downloads: 63 |  |
| Analysis of the injection of a heated turbulent jet into a cross flow - Campbell, J. F.
The development of a theoretical model is investigated of the incompressible jet injection process. The discharge of a turbulent jet into a cross flow was mathematically modeled by using an integral method which accounts for natural fluid mechanisms such as turbulence, entrainment, buoyancy, and heat transfer. The analytical results are supported by experimental data and demonstrate the usefulness of the theory for estimating the trajectory and flow properties of the jet for a variety of injecti...
Keywords: AIR TRANSPORTATION; ECONOMIC FACTORS; ENERGY BUDGETS; COMBUSTION EFFICIENCY; ENERGY DISSIPATION; FUEL CONSUMPTION; HYDROGEN FUELS
Downloads: 53 |  |
| Detection of low levels of microbial contamination on surfaces by chemical approaches - NON
Standardization of thin layer chromatographic procedure and microscope photometer for detecting small numbers of microbial cells
Keywords: CRITICAL MASS; NUCLEAR PROPULSION; NUCLEAR REACTORS; ROCKET ENGINES; HYDROGEN FUELS; REFLECTORS; SYSTEMS ENGINEERING; URANIUM ISOTOPES
Downloads: 43 |  |
| Engine-integrated secondary injection side- force generation for the hydrogen-fueled rocket engine - Escher, W. J. D.
Engine-integrated secondary injection side-force generation for hydrogen-fueled rocket engine
Keywords: GIMBALS; HYDROGEN FUELS; ROCKET ENGINES; SECONDARY INJECTION; HYDROGEN FUEL; SECONDARY INJECTION
Downloads: 51 |  |
| PERFORMANCE OF A SHORT COMBUSTOR AT HIGH ALTITUDES USING HYDROGEN FUEL - Fenn, D. B.
Combustor performance using hydrogen fuel at high altitude
Keywords: ALTITUDE; BLOWOUTS; COMBUSTION CHAMBERS; HIGH ALTITUDE; HYDROGEN FUELS; JP-4 JET FUEL; COMBUSTOR; HIGH ALTITUDE; HYDROGEN
Downloads: 68 |  |
| Office of Exploration: Exploration studies technical report. Volume 2: Studies approach and results - Roberts, Barney B.
The NASA Office of Exploration has been tasked with defining and recommending alternatives for an early 1990's national decision on a focused program of human exploration of the solar system. The Mission Analysis and System Engineering (MASE) group, which is managed by the Exploration Studies Office at the Johnson Space Center, is responsible for coordinating the technical studies necessary for accomplishing such a task...
Keywords: ACOUSTIC MEASUREMENT; EVALUATION; HELMHOLTZ RESONATORS; SUPERSONIC WIND TUNNELS; ENERGY ABSORPTION; HYDROGEN FUELS; INFRASONIC FREQUENCIES; NOISE; SEALING
Downloads: 121 |  |
| Brief studies of turbojet combustor and fuel-system operation with hydrogen fuel at -400 deg f - Christenson, H. H.
Turbojet combustor and fuel system operation with hydrogen fuel at -400 deg F
Keywords: COMBUSTION CHAMBERS; FUEL SYSTEMS; HYDROGEN FUELS; TURBOJET ENGINES; COMBUSTOR; FUEL SYSTEM; HYDROGEN FUEL; TURBOJET ENGINE
Downloads: 47 |  |
| Tests with hydrogen fuel in a simulated afterburner - Dangle, E. E.
Hydrogen fuel combustion analysis in simulated afterburner
Keywords: AFTERBURNING; FUEL COMBUSTION; HYDROGEN FUELS; SIMULATION; AFTERBURNER; COMBUSTION; HYDROGEN FUEL; SIMULATION
Downloads: 50 |  |
| A Web Centric Architecture for Deploying Multi-Disciplinary Engineering Design Processes - Woyak, Scott
There are continuous needs for engineering organizations to improve their design process. Current state of the art techniques use computational simulations to predict design performance, and optimize it through advanced design methods. These tools have been used mostly by individual engineers. This paper presents an architecture for achieving results at an organization level beyond individual level...
Keywords: FLOW CHARACTERISTICS; DESIGN ANALYSIS; SUPERSONIC COMBUSTION RAMJET ENGINES; HYPERSONIC SPEED; HYDROGEN FUELS; GROUND TESTS; ENGINE TESTS; THERMAL ANALYSIS; COMBUSTION CHAMBERS
Downloads: 52 |  |
| Application of Colorimetric Solid Phase Extraction (C-SPE) to Monitoring Nickel(II) and Lead(II) in Spacecraft Water Supplies - Diaz, Neil C.
Archived water samples collected on the International Space Station (ISS) and returned to Earth for analysis have, in a few instances, contained trace levels of heavy metals. Building on our previous advances using Colorimetric Solid Phase Extraction (C-SPE) as a biocide monitoring technique, we are devising methods for the low level monitoring of nickel(II), lead(II) and other heavy metals. C-SPE is a sorption-spectrophotometric platform based on the extraction of analytes onto a membrane impre...
Keywords: SUPERSONIC COMBUSTION RAMJET ENGINES; LAUNCHING; PAYLOADS; REENTRY VEHICLES; SUPERSONIC COMBUSTION; FLIGHT TESTS; POSTFLIGHT ANALYSIS; WEDGES; HYDROGEN FUELS
Downloads: 53 |  |
| Wind-tunnel investigation of the thrust augmentor performance of a large-scale swept wing model - Koenig, D. G.
Tests were made in the Ames 40- by 80-foot wind tunnel to determine the forward speed effects on wing-mounted thrust augmentors. The large-scale model was powered by the compressor output of J-85 driven viper compressors. The flap settings used were 15 deg and 30 deg with 0 deg, 15 deg, and 30 deg aileron settings. The maximum duct pressure, and wind tunnel dynamic pressure were 66 cmHg (26 in Hg) and 1190 N/sq m (25 lb/sq ft), respectively...
Keywords: HIGH ENERGY PROPELLANTS; ROCKET ENGINES; THRUST CHAMBERS; HYDROGEN FUELS; LIQUID HYDROGEN; RESEARCH; CONFERENCES; FABRICATION; HISTORIES; LIQUID ROCKET PROPELLANTS; RESEARCH FACILITIES
Downloads: 59 |  |
| Determination of Material Properties Near the Glass Transition Temperature for an Isogrid Boom - Blandino, Joseph R
Experiments were performed and results obtained to determine the temperature dependence of the modulus of elasticity for a thermoplastic isogrid tube. The isogrid tube was subjected to axial tensile loads of 0-100 lbf and strain was measured at room and elevated temperatures of 100, 120, 140, 160, 180, 190, and 200 F. These were based on tube manufacturer specifying an incorrect glass transition temperature of 210 F...
Keywords: THERMODYNAMIC CYCLES; COMPUTATIONAL FLUID DYNAMICS; AIR BREATHING ENGINES; PULSE DETONATION ENGINES; HYDROGEN FUELS; SPECIFIC IMPULSE; FUEL CONSUMPTION
Downloads: 65 |  |
| PERFORMANCE OF A SHORT TURBOJET COMBUSTOR WITH HYDROGEN FUEL IN A QUARTER-ANNULUS DUCT AND COMPARISON WITH PERFORMANCE IN A FULL-SCALE ENGINE - Friedman, R.
Full-scale and quarter-annulus duct comparisons of short turbojet combustor performance with hydrogen fuel
Keywords: ANNULI; FUEL TESTING; TURBOJET ENGINE; COMBUSTION CHAMBERS; DUCTS; FUEL TESTS; HYDROGEN FUELS; TURBOJET ENGINES; COMBUSTION CHAMBER; COMBUSTOR; DUCT
Downloads: 68 |  |
| Toward Synthesis, Analysis, and Certification of Security Protocols - Schumann, Johan
Implemented security protocols are basically pieces of software which are used to (a) authenticate the other communication partners, (b) establish a secure communication channel between them (using insecure communication media), and (c) transfer data between the communication partners in such a way that these data only available to the desired receiver, but not to anyone else. Such an implementation usually consists of the following components: the protocol-engine, which controls in which sequen...
Keywords: LIQUID HYDROGEN; CENTAUR LAUNCH VEHICLE; CRYOGENIC ROCKET PROPELLANTS; HIGH ENERGY PROPELLANTS; NASA PROGRAMS; ROCKET EXHAUST; HYDROGEN FUELS
Downloads: 59 |  |
| Users manual for the Variable dimension Automatic Synthesis Program (VASP) - White, J. S.
A dictionary and some problems for the Variable Automatic Synthesis Program VASP are submitted. The dictionary contains a description of each subroutine and instructions on its use. The example problems give the user a better perspective on the use of VASP for solving problems in modern control theory. These example problems include dynamic response, optimal control gain, solution of the sampled data matrix Ricatti equation, matrix decomposition, and pseudo inverse of a matrix...
Keywords: ACCELERATION (PHYSICS); HYDROGEN FUELS; PROPULSION SYSTEM CONFIGURATIONS; SUPERSONIC COMBUSTION RAMJET ENGINES; TRANSPORT AIRCRAFT; CRUISING FLIGHT; SONIC BOOMS
Downloads: 83 |  |
| EXPLORATORY INVESTIGATION OF PERFORMANCE OF EXPERIMENTAL FUELRICH HYDROGEN COMBUSTION SYSTEM - Grobman, J. S.
Exploratory investigation of performance characteristics of fuel-rich hydrogen combustor
Keywords: AFTERBURNING; FLAME HOLDER; GAS TURBINE; HYDROGEN FUEL; COMBUSTION; COMBUSTION CHAMBERS; FLAME HOLDERS; GAS TURBINES; HYDROGEN; HYDROGEN FUELS; AFTERBURNER; COMBUSTOR
Downloads: 71 |  |
| Experimental investigation of hypersonic aerodynamics - Intrieri, Peter F
An extensive series of ballistic range tests were conducted at the Ames Research Center to determine precisely the aerodynamic characteristics of the Galileo entry probe vehicle. Figures and tables are presented which summarize the results of these ballistic range tests. Drag data were obtained for both a nonablated and a hypothesized ablated Galileo configuration at Mach numbers from about 0.7 to 14 and at Reynolds numbers from 1000 to 4 million...
Keywords: AEROSPACE PLANES; CONVECTIVE HEAT TRANSFER; CRYOGENIC COOLING; HYPERSONIC FLIGHT; REGENERATIVE COOLING; HEAT FLUX; HYDROGEN FUELS; LIQUID HYDROGEN
Downloads: 79 |  |
| NASA and Mt. St. Helens - NON
NASA technology played an important part in the Mt. St. Helen's aftermath, not only in scientific studies, but also in disaster assessment and relief operations. A particular problem was maintaining communications with rescue ground crews and evacuation helicopters operating in the smoke-obscured area. The key element came from NASA's ATS-3 satellite, which is capable of beaming to and receiving signals from small, simple antennas on the ground, and a communications jeep developed by the Air For...
Keywords: EXPERIMENT DESIGN; SUPERSONIC COMBUSTION RAMJET ENGINES; TEMPERATURE DISTRIBUTION; TEMPERATURE MEASUREMENT; THERMAL MAPPING; COMBUSTION CHAMBERS; FLOW DISTRIBUTION; HYDROGEN FUELS; RAMAN SPECTROSCOPY
Downloads: 81 |  |
| Development of integrated programs for Aerospace-vehicle Design (IPAD): Product program management systems - Isenberg, J. M.
The Integrated Programs for Aerospace Vehicle Design (IPAD) is a computing system to support company-wide design information processing. This document presents a brief description of the management system used to direct and control a product-oriented program. This document, together with the reference design process (CR 2981) and the manufacture interactions with the design process (CR 2982), comprises the reference information that forms the basis for specifying IPAD system requirements.
Keywords: ENGINE DESIGN; RECONNAISSANCE AIRCRAFT; TURBOJET ENGINES; TURBOROCKET ENGINES; U-2 AIRCRAFT; HIGH ALTITUDE; HYDROGEN FUELS; TECHNOLOGY ASSESSMENT; AIRCRAFT ENGINES; ECONOMIC ANALYSIS; HISTORIES; HYDROGEN ENGINES; HYDROGEN OXYGEN ENGINES
Downloads: 52 |  |
| Measurements in a large angle oblique jet impingement flow - Foss, J. F
The flow field associated with the oblique impingement of an axisymmetric jet was investigated in the externally blown flap configuration for the STOL aircraft. The passive and active spreading characteristics of the shallow angle (a greater than or = approximately to 15 degrees) oblique impingement flow, the role of the initially azimuthal vorticity field, and the stagnation point region were studied, and compared to the large ( a = 45 degres) oblique jet impingement flow...
Keywords: AIRCRAFT FUELS; HYDROGEN FUELS; VENTS; GAS RECOVERY; LIQUID HYDROGEN; AIRCRAFT DESIGN; COLD GAS; COST ESTIMATES; ECONOMIC ANALYSIS; ENERGY CONSERVATION; FLIGHT TESTS
Downloads: 70 |  |
| Field Studies of Crater Gradation in Gusev Crater and Meridiani Planum Using the Mars Exploration Rovers - Grant, J. A.
The Mars Exploration Rovers Spirit and Opportunity investigated numerous craters since landing in Gusev crater (14.569degS, 175.473degE) and Meridiani Planum (1.946degS, 354.473degE) over the first 400 sols of their missions [1-4]. Craters at both sites are simple structures and vary in size and preservation state. Comparing observed and expected pristine morphology and using process-specific gradational signatures around terrestrial craters as a template [5-7] allows distinguishing gradation pr...
Keywords: HYDROGEN FUELS; CRYOGENIC TANKS; ELECTRIC MOTORS; GAS TURBINES; CLEAN FUELS; AIRCRAFT FUELS; FUEL CELLS; AIRCRAFT ENGINES; POLLUTION CONTROL; AIR POLLUTION; EXHAUST EMISSION; AIRCRAFT CONFIGURATIONS
Downloads: 39 |  |
| Handbook of physical and thermal property data for hydrogen. Triple point region to critical point region. Volume I - A study of hydrogen slush and/or hydrogen gel utilization - NON
Handbook of physical and thermal property data for hydrogen in region between triple point and critical point for study of hydrogen slush and/or hydrogen gel utilization
Keywords: CRITICAL POINT; HANDBOOK; HYDROGEN FUEL; PHYSICAL PROPERTY; SLUSH; THERMAL PROPERTY; GELS; HANDBOOKS; HYDROGEN; HYDROGEN FUELS; PHYSICAL PROPERTIES; SLUSH; SPACECRAFT; THERMODYNAMIC PROPERTIES
Downloads: 103 |  |
| SNAP-8 turbine labyrinth seal galling tests - Cherry, M. G.
No Abstract Available
Keywords: BOMBER AIRCRAFT; LIFT DRAG RATIO; MISSILES; MISSION PLANNING; STRUCTURAL DESIGN; SUPERSONIC INLETS; FLIGHT CHARACTERISTICS; HYDROGEN FUELS; PROPULSION SYSTEM CONFIGURATIONS; RAMJET ENGINES; TURBOJET ENGINES; CONFERENCES; COOLING SYSTEMS; EXHAUST NOZZLES
Downloads: 80 |  |
| Advanced System Design Requirements for Large and Small Fixed-wing Aerial Application Systems for Agriculture - Hinely, J. T., Jr.
Several candidate aircraft configurations were defined over the range of 1000 to 10,000 pounds payload and evaluated over a broad spectrum of agricultural missions. From these studies, baseline design points were selected at 3200 pounds payload for the small aircraft and 7500 pounds for the large aircraft. The small baseline aircraft utilizes a single turboprop powerplant while the large aircraft utilizes two turboprop powerplants...
Keywords: HIGH ALTITUDE; SUPERSONIC AIRCRAFT; TECHNOLOGY ASSESSMENT; TURBOJET ENGINES; HIGH SPEED; HYDROGEN; HYDROGEN FUELS; RESEARCH; B-57 AIRCRAFT; ENGINE DESIGN; FUEL TANKS; HISTORIES
Downloads: 114 |  |
| Combustion of gaseous hydrogen at low pressures in a 35 deg sector of a 28-inch-diameter ramjet combustor - Kerslake, W. R
Shrouded fuel injector for low pressure hydrogen combustion in high-altitude ramjet engine
Keywords: COMBUSTION; RAMJET ENGINES; SHROUDS; FUEL COMBUSTION; HYDROGEN FUEL; RAMJET ENGINE; COMBUSTION CHAMBERS; FUEL COMBUSTION; FUEL INJECTION; GAS PRESSURE; HIGH ALTITUDE; HYDROGEN; HYDROGEN FUELS; LOW PRESSURE
Downloads: 44 |  |
| Prediction of Business Jet Airloads Using The Overflow Navier-Stokes Code - Bounajem, Elias
The objective of this work is to evaluate the application of Navier-Stokes computational fluid dynamics technology, for the purpose of predicting off-design condition airloads on a business jet configuration in the transonic regime. The NASA Navier-Stokes flow solver OVERFLOW with Chimera overset grid capability, availability of several numerical schemes and convergence acceleration techniques was selected for this work...
Keywords: COMPUTATIONAL FLUID DYNAMICS; TURBULENCE MODELS; SPRAYERS; COMBUSTION CHEMISTRY; COMBUSTION PHYSICS; LIQUID ROCKET PROPELLANTS; INJECTORS; LIQUID PROPELLANT ROCKET ENGINES; COMPUTERIZED SIMULATION; COMPUTER PROGRAMS; COMBUSTION CHAMBERS; HYDROGEN FUELS; HETEROGENEITY
Downloads: 45 |  |
| TURBOJET PERFORMANCE AND OPERATION AT HIGH ALTITUDES WITH HYDROGEN AND JP-4 FUELS - Chelko, L. J.
Effect of high altitude on performance & operating characteristics of turbojet engines with hydrogen and jp-4 fuels
Keywords: ALTITUDE; HYDROGEN FUEL; JP-4 JET FUEL; TURBOJET ENGINE; TURBOPROP ENGINE; COMBUSTION; HIGH ALTITUDE; HYDROGEN FUELS; JP-4 JET FUEL; TURBOJET ENGINES; TURBOPROP ENGINES; COMBUSTION; HIGH ALTITUDE
Downloads: 140 |  |
| Interpretation of Waverider Performance Data Using Computational Fluid Dynamics - Cockrell, Charles E., Jr
A computational study was conducted to better understand experimental results obtained from wind tunnel tests of a Mach 4 waverider model and a comparative reference configuration. The experimental results showed that the performance of the reference configuration was slightly better than that of the waverider model. These results contradict waverider design theory, which suggests that a waverider optimized for maximum lift-to-drag should provide better performance than any other non-waverider c...
Keywords: COMBUSTION CHAMBERS; STATIC PRESSURE; SUPERSONIC FLOW; SUPERSONIC SPEED; GAS STREAMS; SUPERSONIC COMBUSTION; TEMPERATURE MEASUREMENT; COHERENT SCATTERING; FIBER OPTICS; HYDROGEN FUELS; LASER BEAMS; RAMAN SPECTRA
Downloads: 56 |  |
| Hydrogen as a rocket fuel, appendix A-4 - NON
The early general experiences in using either gaseous or liquid hydrogen in flight applications were not favorable. The desirable characteristics of rocket fuels are briefly outlined. Hydrogen is evaluated against each criterion in order to best understand why hydrogen was unfavorable.
Keywords: ARMED FORCES (UNITED STATES); LIQUEFACTION; RESEARCH FACILITIES; ROCKET ENGINES; SCIENTISTS; HYDROGEN FUELS; LIQUID HYDROGEN; MILITARY TECHNOLOGY; RESEARCH; CRYOGENICS; CRYOPUMPING; FLUORINE; HISTORIES
Downloads: 60 |  |
| Performance of a 28-inch ramjet utilizing gaseous hydrogen at a mach number of 3.6, angles of attack up to 12 deg, and pressure altitudes up to 110,000 feet - Musial, N. T.
Combustion efficiency of gaseous hydrogen fuel for ramjets at very high altitudes and high distortion
Keywords: ALTITUDE; COMBUSTION EFFICIENCY; DISTORTION; HYDROGEN FUEL; RAMJET ENGINE; ANGLE OF ATTACK; COMBUSTION EFFICIENCY; DISTORTION; HIGH ALTITUDE; HYDROGEN; HYDROGEN FUELS; RAMJET ENGINES; SUPERSONIC SPEED
Downloads: 49 |  |
| Experimental performance of a hydrogen- fluorine rocket engine at several chamber pressures and exhaust-nozzle expansion area ratios - Aukerman, C. A.
Experimental performance of hydrogen-fluorine rocket engine at several chamber pressures and exhaust-nozzle expansion area ratios
Keywords: EXHAUST NOZZLES; HYDROGEN FUEL; LIQUID PROPELLANT ROCKET ENGINE; NOZZLE EXPANSION; FLUORINE; HYDROGEN FUELS; LIQUID PROPELLANT ROCKET ENGINES; NOZZLE GEOMETRY; PRESSURE CHAMBERS; ROCKET ENGINES; CHAMBER PRESSURE; FLUORINE
Downloads: 66 |  |
| An Efficient and Robust Singular Value Method for Star Pattern Recognition and Attitude Determination - Juang, Jer-Nan
A new star pattern recognition method is developed using singular value decomposition of a measured unit column vector matrix in a measurement frame and the corresponding cataloged vector matrix in a reference frame. It is shown that singular values and right singular vectors are invariant with respect to coordinate transformation and robust under uncertainty. One advantage of singular value comparison is that a pairing process for individual measured and cataloged stars is not necessary, and th...
Keywords: COMBUSTION CHAMBERS; FUEL INJECTION; SUPERSONIC SPEED; LASERS; COMPUTERIZED SIMULATION; COMPUTATIONAL FLUID DYNAMICS; SUPERSONIC COMBUSTION RAMJET ENGINES; AEROSPACE ENGINEERING; HYBRID PROPULSION; HYDROGEN FUELS; PARTICLE IMAGE VELOCIMETRY; PLUMES; PRESSURE MEASUREMENT
Downloads: 54 |  |
| Beam-Switch Transient Effects in the RF Path of the ICAPA Receive Phased Array Antenna - Sands, O. Scot
When the beam of a Phased Array Antenna (PAA) is switched from one pointing direction to another, transient effects in the RF path of the antenna are observed. Testing described in the report has revealed implementation-specific transient effects in the RF channel that are associated with digital clocking pulses that occur with transfer of data from the Beam Steering Controller (BSC) to the digital electronics of the PAA under test...
Keywords: EJECTORS; STATIC PRESSURE; THRUST; COMBUSTION PHYSICS; PROPULSION SYSTEM PERFORMANCE; ROCKET-BASED COMBINED-CYCLE ENGINES; SPACECRAFT PROPULSION; GASEOUS ROCKET PROPELLANTS; COMPUTATIONAL FLUID DYNAMICS; LIQUID OXYGEN; HYDROGEN FUELS; AFTERBURNING; DIFFUSION
Downloads: 55 |  |
| A Mariner orbiter autopilot design - Kopf, E. H
Mariner orbiter autopilot design
Keywords: CRYOGENIC ROCKET PROPELLANTS; MARS PROBES; MULTISTAGE ROCKET VEHICLES; HYDROGEN FUELS; PAYLOAD MASS RATIO; SATURN S-4 STAGE; SLUSH; FLYBY MISSIONS; GELS; LIQUID PROPELLANT ROCKET ENGINES; MANNED SPACE FLIGHT
Downloads: 70 |  |
| Demonstration of intercontinental DSN clock synchronization by VLBI - Hurd, W. J
The prototype system for Deep Space Network clock synchronization by VLBI has been demonstrated to operate successfully over intercontinental baselines in a series of experiments between Deep Space Stations at Madrid, Spain, and Goldstone, California. As predicted by analysis and short baseline demonstration, the system achieves reliable synchronization between 26m and 64m antenna stations with 17 and 37K nominal system temperatures using under one million bits of data from each station...
Keywords: AIRCRAFT FUELS; NUMERICAL ANALYSIS; PERFORMANCE PREDICTION; FUEL COMBUSTION; HYDROGEN FUELS; LIQUID HYDROGEN; PROPULSION SYSTEM PERFORMANCE; SUPERSONIC TRANSPORTS; AIRCRAFT PERFORMANCE; COST ANALYSIS; MISSION PLANNING
Downloads: 87
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| Preliminary Results of a Free-Flight Investigation of the Static Stability and Aileron Control Characteristics of 1/6 Scale Models of the Bell MX-776 - Michal, David H.
An investigation of the static longitudinal stability, static directional stability, and aileron control characteristics at transonic and supersonic speeds is being made of 1/6 scale rocket-propelled model of the Bell MX-776. A stability investigation has been made of two symmetrical models with controls undeflected and centers of gravity one-half and one-body diameter, respectively, ahead of the equivalent design center-of-gravity location of the full-scale version...
Keywords: CALIBRATING; FOREBODIES; HYDROGEN FUELS; MOUNTING; OXYGEN; REFINING; REPLICAS; SILANES; STEADY FLOW; TARGETS; FLIGHT CONDITIONS; GROUND TESTS; HYPERSONIC SPEED; MACH NUMBER; PROVING; RESEARCH VEHICLES; AFTERBODIES; FLAT PLATES
Downloads: 50 |  |
| Large Area X-Ray Spectroscopy Mission - Tananbaum, H
The Large Area X-ray Spectroscopy (LAXS) mission concept study continues to evolve strongly following the merging of the LAXS mission with the Next Generation X-ray Observatory (NGXO, PI: Nick White) into the re-named High Throughput X-ray Spectroscopy (HTXS) Mission. HTXS retains key elements of the LAXS proposal, including the use of multiple satellites for risk-reduction and cost savings. A key achievement of the program has been the recommendation by the Structure and Evolution of the Univer...
Keywords: HYPERSONIC VEHICLES; LEADING EDGES; GENERAL OVERVIEWS; PROPULSION SYSTEM PERFORMANCE; HYPERSONICS; HYDROGEN FUELS; HYDROCARBON FUELS; AIR BREATHING ENGINES; ROCKET ENGINES; FUEL SYSTEMS; AIRFRAMES; SINGLE STAGE TO ORBIT VEHICLES
Downloads: 75 |  |
| Aero-astrodynamics research review - Murphree, W. D
Aero-astrodynamics research review, and report bibliography, July 1967 to August 1968
Keywords: CRYOGENIC ROCKET PROPELLANTS; SCALE MODELS; FLOW MEASUREMENT; LIQUID HYDROGEN; SLUSH; ARTIFICIAL SATELLITES; FUEL TANKS; HYDROGEN FUELS; MULTISTAGE ROCKET VEHICLES; PERFORMANCE TESTS
Downloads: 192 |  |
| Development and Operations of the Astrophysics Data System - Murray, Stephen S
The ADS was represented at the AAS meeting with 3 poster papers and a demonstration booth. We have setup a mirror site of the Vizier data base system at the CDS. functionality of the ADC at Goddard. This will replace the Preparations for the APS and LPSC meetings in March started. We will have demonstrations at both meetings. Preparations for the APS and LPSC meetings in March continued. We will have demonstrations at both meetings...
Keywords: RAMAN SPECTROSCOPY; ENTHALPY; OXYGEN; WATER VAPOR; NITROGEN; TEMPERATURE PROFILES; SUPERSONIC COMBUSTION; TEST FACILITIES; HYDROGEN FUELS; GAS MIXTURES; COHERENT SCATTERING; COMPUTATIONAL FLUID DYNAMICS; AIR FLOW; FUEL INJECTION
Downloads: 46 |  |
| Space shuttle solid rocket booster recovery system definition, volume 1 - NON
The performance requirements, preliminary designs, and development program plans for an airborne recovery system for the space shuttle solid rocket booster are discussed. The analyses performed during the study phase of the program are presented. The basic considerations which established the system configuration are defined. A Monte Carlo statistical technique using random sampling of the probability distribution for the critical water impact parameters was used to determine the failure probabi...
Keywords: EXHAUST GASES; NITRIC OXIDE; HYPERSONIC VEHICLES; SUPERSONIC COMBUSTION RAMJET ENGINES; TRANSPORT AIRCRAFT; AIR POLLUTION; COMBUSTION TEMPERATURE; COMPUTER PROGRAMMING; EXHAUST NOZZLES; HYDROGEN FUELS
Downloads: 144 |  |
| Quench Module Insert (QMI) and the Diffusion Module Insert (DMI) Furnace Development - Crouch, Myscha R.
The Quench Module Insert (QMI) and the Diffusion Module Insert (DMI) are microgravity furnaces under development at Marshall Space Flight Center. The furnaces are being developed for the first Materials Science Research Rack (MSRR-1) of the Materials Science Research Facility (MSRF), one of the first International Space Station (ISS) scientific payloads. QMI is a Bridgman furnace with quench capability for studying interface behavior during directional solidification of metallic and alloy materi...
Keywords: CRYOGENIC FLUID STORAGE; HYDROGEN FUELS; CRYOGENICS; CRYOGENIC COOLING; PROPELLANT STORAGE; SPHERICAL TANKS; STORAGE TANKS; MULTILAYER INSULATION; TEMPERATURE CONTROL; THERMAL INSULATION; LIQUID HYDROGEN; CRYOGENIC ROCKET PROPELLANTS
Downloads: 52 |  |
| Experimental performance of liquid hydrogen and liquid fluorine in regeneratively cooled rocket engines - Douglass, H. W.
Performance of liquid hydrogen-fluorine propellant combination in regeneratively cooled rocket engine
Keywords: HEAT TRANSFER; LIQUID; LIQUID PROPELLANT ROCKET ENGINE; REGENERATIVE COOLING; HYDROGEN FUELS; LIQUID FLUORINE; LIQUID HYDROGEN; LIQUID PROPELLANT ROCKET ENGINES; LIQUID ROCKET PROPELLANTS; REGENERATIVE COOLING; ROCKET ENGINES; HYDROGEN FUEL
Downloads: 79 |  |
| Subject headings for index of NACA publications - NON
No Abstract Available
Keywords: ADVANCED LAUNCH SYSTEM (STS); HYDROGEN FUELS; LIQUID FUELS; MACH NUMBER; AEROSPACE PLANES; AIR BREATHING BOOSTERS; LIQUID PROPELLANT ROCKET ENGINES; PROPULSION SYSTEM CONFIGURATIONS; SUPERSONIC COMBUSTION RAMJET ENGINES; TURBORAMJET ENGINES; TURBOROCKET ENGINES; FEASIBILITY ANALYSIS
Downloads: 36 |  |
| Discussion of synchronization words - Morakis, J. C
No Abstract Available
Keywords: ADVANCED LAUNCH SYSTEM (STS); AEROSPACE PLANES; FEASIBILITY ANALYSIS; MACH NUMBER; AIR BREATHING BOOSTERS; HYDROGEN FUELS; LAUNCH VEHICLES; LIQUID HYDROGEN; LIQUID PROPELLANT ROCKET ENGINES; PROPULSION SYSTEM CONFIGURATIONS; SUPERSONIC COMBUSTION RAMJET ENGINES; TURBORAMJET ENGINES
Downloads: 45 |  |
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